Suspension having an isolated trailling portion, head gimbal assembly and disk drive unit with the same

Abstract

A suspension for a head gimbal assembly comprises a flexure having a suspension tongue with a trailing portion. The trailing portion has a plurality of trailing pads formed thereon adapted for bonding to a trailing edge of a slider. The trailing portion is isolated from other portions of the flexure by a first slot surrounding the trailing portion. The isolated trailing portion is not affected due to the temperature change, the thermal crown change of the slider is reduced and, in turn, the variation of flying height of the slider is reduce so as to improve read / write performance of the slider. The invention also discloses a head gimbal assembly and a disk drive unit with the same.

Description

FIELD OF THE INVENTION[0001]The present invention relates to information recording disk drive devices, and more particularly to a suspension having an isolated training portion bonded to a slider, head gimbal assembly and disk drive unit with the same.BACKGROUND OF THE INVENTION[0002]Disk drive devices are common information storage devices. FIG. 1a illustrates a conventional disk drive device and shows a magnetic disk 101 mounted on a spindle motor 102 for spinning the disk 101. A voice coil motor arm 104 carries a head gimbal assembly (HGA) 100 that includes a slider 103 incorporating a read / write transducer. A voice-coil motor (VCM, not labeled) is provided for controlling the motion of the motor arm 104 and, in turn, controlling the slider 103 to move from track to track across the surface of the disk 101, thereby enabling the read / write head to read data from or write data to the disk 101.[0003]Now referring to FIG. 1b, the HGA 100 comprises a slider 103 having a reading / writin...

AI Technical Summary

Benefits of technology

[0010]One aspect of the present invention is to provide a suspension for a head gimbal assembly that can reduce variation of flying height of a slider to improve flying performance thereof and yield lower shock stresses at the grounding pads and the bonding pads.

[0011]Another aspect of the present invention is to provide a head gimbal assembly that can reduce variation of flying height of a slider to improve flying performance thereof and improve the shock performance thereof.

[0012]Still another aspect of the present invention is to provide a disk drive unit that can reduce variation of flying height of a slider to improve flying performance thereof and improve the shock performance thereof.

[0021]Compared with the flexure of the conventional suspension, because the trailing portion is isolated from other portions of the flexure, the expansion and contraction of the suspension tongue caused by strong temperature changes will have less impact on the trailing portion, thus it can reduce the thermal crown change of the slider and, in turn, reduce the variation of flying height of a slider to improve flying performance of the slider. Furthermore, it yields lower shock stresses at the trailing pads and the leading pads, so the shock performance is also improved. In addition, with the introduction of other slots formed on the suspension tongue, the thermal crown change of the slider under different temperature can be further reduced so that the flying performance of the slider can be improved.

Problems solved by technology

With reduction of the flying height, it is strongly expected that the flying height be kept constant all the time regardless of variable flying conditions, since great variation of flying height will deteriorate reading / writing performance of the slider, and in worse cases even result in data reading / writing failure.

Specifically, when subjected to strong temperature changes, the suspension tongue will expand or contract, thus making the profile of the slider mounted thereon also deformed, and finally resulting in variation of the flying height.

The flying height variation further badly affects the reading / writing performance of the slider.

However, the structure of the suspension 190 described above is still sensitive to the thermal affect and apt to result in great variation of flying height of the slider, and also leads to high shock stresses at the bonding pads 126 and grounding pads 125.

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